Synthesis of SrAl_2O_4 from a mixed-metal citrate precursor

摘要

A mixed-metal citrate precursor method was used to synthesize SrAl_2O_4. The effects of the pH of the starting solutions and the molar ratio of citric acid to total metal cations concentration (CA/M) on the formation of SrAl_2O_4 were studied. DTA, TG, FT-IR, XRD and field emission scanning electron microscopy (FESEM) were used to characterize the precursors and the derived oxide powders. XRD analysis showed that single-phase SrAl_2O_4 was synthesized from CA/M = 2 precursors at a temperature of 900℃ for 2 h, without the formation of any intermediate phase.